Incandescent gas-light miner&#39;s lamp



May 5, 1931. w. GOSMANN 1,803,755

' [NCANDESCENT GAS LIGHT MINER'S LAMP I Filed Aug. 14, 1929 2 Sheets-Sheet i 7 g j? g: F

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, Waifer 60671137172 8 g u t y Anoraey May 5, 1931. w. GO SMANN ,80 ,7 6

- INGANDESCENT GAS LIGHT MINERS LAMP 4 Filed Aug. 14, 1929 2 Sheets-Sheet 2 Inventor- WaZZer- 60-3 111-2717:

Patented May 5, 1931 v UNITED STATES WALTER GOSMANN, or nonrivrunnennivrnny mcnnnnsomvr GAS-LIGHT mrnnivs LAMP' Application filed August 14, 1929, Serial No The invention relates to anincandescent gas-light miners lamp into which, by means of compressed air produced on the surface and available at all points in mines through pipe lines which represents a methane-free compressed air current, the medium is conveyed for producing combustion gas and for preparing a mixture of combustion gas and air, for cooling the combustion space and for providing for the requisite safety of the lamp,

whereby the pressure of the admitted compressed air also efiects the breaking of the circuit of an electric auxiliary lamp and, at the same time, makes contact with theignition medium for the mixture of combustion gas in the incandescent gas-light body, while the circuit of theau'xiliary lamp is auto matically closed again when the compressed air supply is disconnected.

In the accompanying drawings an incandescent gas-light miners lamp embodying the present invention is shown and Fig. l is a sectional elevation of the lamp.

Figs. 2 and 3 are cross sections on the lines 7 2-2 and 83.of Fig. 1 and Fig. 4 is a sectional detai trol device associated with adjunct parts of the lamp. v

The incandescent gas-light miners" lamp comprises a body formed of upper and lower sections, the lower portion 1 and the upper portion 2 whose screwed joint 8 is secured in the usual manner by a magneticlocking device 3. In the lower portion 1 of the lamp,

' which is formed as a container, are disposed two alkaline electric accumulators 4, thepoles 4' of which are pressed against the contacts 6 by spiral springs 5, the contacts being fitted in the plate 7 of the upper portion consisting of insulating material. The electric glow lamp 8 is connected with these contacts through the connectors 6. V 1 In addition to the two cells 4, a plurality of wicks 9 are arranged in the lamp container, these wicks filling the space between the two accumulator cells and the container shell. The container is filled with benzine through a sealable aperture in the cover of the lower portion, and, after the wicks have been moistened with liquid fuel, the surplus benzine is 1 view of the con-j 385,783 ,'and in Germany September 3, 1928.

poured 0E. The tube 10, which opens into the mixing chamber 11 provided in the upper portion, is fitted in thecen'tre of the lamp container 1, the mixing chamber communicating with the combustion space in the incandescent gas mantle 13 through the tube 12.

The space, in which the glow lamp 8 and the incandescent mantle 13 are arranged, i. e., the lamp chamber, is closed by cylindrical, concentrically disposed glasses 14 and 15 and the cover 16, and sealed by rubber rings. The "waste gases escape into the air through small orifices in the cover 16. V

The compressed air enters the lamp casing in the direction of the arrow17 through the screw connectionl'? provided withstrainers, saidscrew connection being connected up to the compressed air main by means of a hose. The compressed air fills the space between the upper and lower portion, and is conveyed as a branch current in the direction of the arrows18' through the aperture 18 into the lower portion of the lamp, whence it circulates round the wicks 9, thereby getting saturated with fuel, and'is then led through the riser tube 10 at the bottom of the lower portion to the mixing chamber 11. Here it mixes with the compressed air which enters as a second branch current through the opening 19 in the direction of the arrow 19' in order to obtain gas mixture required for the incandescentmantle 13 where it is ignited bymeans of the electricallyheated platinum wire 20. A third branch current of the compressed air enters the lampchamber of the upper portion 2 through the opening 21 in the direc-' tion of the arrow 21, thereby cooling the lamp chamber, whilea' fourth branch current fills the sealedair space between the concentricf protective glass cylinders 14 and 15 with compressed air through the numerous openings 22. y

In the event of the outside glass 15breaking when connection is made with thecompressed air, i. e., when the lamp is burning,

the compressed air escapes into the air through the openings 22, thereby causing a drop of pressure sogreat that there is no possibility of any compressed air entering the lower portion. For this'purpose only a small inlet 18 is provided for the lower portion in proportion to the numerous openings 22. Owing to the pressure not being high enough, a mixture 01"" fuel can no longer reach the incandescent body, the result being that the incandescent process is instantaneously interrupted. Before the compressed air admitted through the screw connection 17 enters the distributing chamber of the branch current between the upper and lower portion, it presses a piston 23 to one side, whereby, on the one hand, the passage is rendered free for the compressed air in the direction of the arrow 17 and the glow lamp 8 isshut off, while, on the other hand, contact is made with the ignition wire 20 which is heated for the purpose of igniting the gas mixture. The control diagram is shown in Fig. l. The positive pole l or" the accumulator 4 is in metallic connection with the socket of the bulb 8 through the contact scren and the connector 6, the negative pole 4: with the contact 24 of the conductor 6 through the piston 23 and the cross bridge 23 and thus with the socket of the lamp 8; consequently the circuit of the electric glow lamp 8 is closed. In case the compressed air presses the piston to the left, the contact 24 is broken and the contact 25 closed; consequently the circuit of the electric glow lamp 8 is broken and that of the platinum coil 20 closed, causing it to glow and to ignite the gas mixture issuing from the incand scent mantle.

After ignition of the mixture has taken place, the platinum coil 20 requires to be shut oii. The bi-metal strip 26 in the circuit 01" the platinum coil lifts off the contact 27 under the influence of the heat produced and breaks the circuit. If the lamp body is detached from the pressure main, the incandescent gaslight is extinguished, the piston 23 moves to the right under the influence of the spring 28 and closes the contact 2%, causing the electric lamp 8 to glow again.

lVhat I claim is 1. In a miners lamp of the type described, a sectional body, electric current and combustible gas supply means contained within the lowermost section, inner and outer glasses sealed on the uppermost section and forming an outer compressed air chamber and an in ner combustible chamber, a gas burner within the combustible chamber having communication with said gas supply means, an electric glow bulb in the last named chamber, and having circuit connection with the current supply means, an inlet passage adapted to be connected with an external source of air pressure and a compressed air controlled means controlling said circuit and commiuiication between said inlet passage and said chambers.

2. In a miners lamp of the type described, a body, electric current supply and combustible gas supply means contained within the body, inner and outer glasses sealed on the body and forming an outer compressed air chamber and. an inner combustion chamber, a gas burner within the combustion chamber and connected with the gas supply means, an electric glow bulb in the last named chamber and in circuit connection with the current supply means, an electric ignition device within the combustion chamber and arranged in circuit with the current supply means, and a compressed air controlled means for alternately closing the circuit between said device and glow bulb with the current supply means, respectively,and means on the body for connection with an external source of air pressure to deliver it to the chambers, said air controlled means and the gas supply means.

3. in a miners lamp of the type described, a sectional body, electric current supply and combustible gas supply means contained in the lowermost section, inner and outer glasses sealed on the uppermost section and forming an outer compressed air chamber and an inner combustion chamber, a gas burner within said combustion chamber, an electric bulb in the last named chamber and in circuit connection with the current supply means, an electric ignition device within the combustion chamber and arranged in circuit with the current supply means, a compressed air controlled switch for alternately closing the circuit between the device and glow lamp with the current supply means, respectively, and means adapted to be connected to an external source of air pressure for supplying compressed air to the switch, chambers and gas supply means.

Eli)

a. In a miners lamp of the type described,

a sectional body, electric current supply and combustible gas supply means obtained in the lowermost section, inner and outer glasses sealed on the uppermost section and forming an outer compressed air chamber and an inner combustion chamber, a gas burner within the combustion chamber, an electric glow bulb in the last named chamber and in circuit with the current supply means, an electric ignition device within the combustion chamber and in circuit with the current supply means, a compressed air controlled switch for alternately closing the circuit between the device and glow bulb with the current supply means, respectively, means adapted to be connected to an external source of air pressure for supplying compressed air to the switch, chambers and gas supply means, and thermostat means responsive to the heat. of said burner for opening the circuit to said ignition device.

5. A lamp of the type described, comprising a body having a removable upper section, spaced concentrically disposed glasses on the upper section to form independent inner and outer chambers, an electric bulb in the inner chamber, a gas burner in said inner chamber,

electric current supply means in the body and in circuit with the bulb, an electric ignition device in the inner chamber for the burner and in circuit with the current supply s means, means for supplying a gaseous mixture to the burner, means adapted to be con-' nected to an external source of air pressure for supplying compressed air to the gaseous supply means and said chambers, and means 19 for alternately closing the circuit'of the bulb and device with the current supply means and controlled by compressed air.

6. A. lamp of the type described, comprising a body having aremovable upper section, spaced concentrically disposed glasses on the upper section to form independent inner and outer chambers, an electric bulb in the inner chamber, a'gas burner in said lighting chamber, electric current supply means in the body 20 and in circuit with the bulb, an electric ignition device in the inner chamber for. the burner and in circuit with the current supply means, means for supplying a gaseous mixture to the burner, means adapted to be connected to an external source of air pressure for supplying compressed air to the gaseous mixture and said chambers, means for alternately closing the circuit of the bulb and device with the current supply means and controlled by compressed air, and means in association with the last named means for controolling the delivery of compressed air to the b0 y.

7. In a lamp of the type described, a body 5 having an illuminating chamber, gas and electric lighting means in said chamber, ignition means for the gas lighting means, means for supplying gaseous mixture to the gas lighting means, and compressed air controlled means for alternately rendering active the electric lighting and ignition means.

In testimony whereof I aflix my signature.

WALTER GrOSMANN. 

